Specs:

• Insulation Resistance: 0 to 20,000 MW
• Accuracy: ±3% of scale length on a 3.08 inch arc length
• Nominal Test Voltages: DC: 100 V, 250 V, 500 V, 1000 V
• Midscale resistance: 40 megohm
• Short Circuit Current: 220 μA nominal on all ranges

Features:

• Guard terminal to eliminate surface leakage current
• All electronic; it generates a regulated DC high voltage and uses low-zero-drift, high-accuracy circuits, with high current sensitivity
• Protected for connection to power distribution systems up to 300 V Line-Ground and 500 V Line-Line for Installation Category III
• Power from a low-voltage, hand cranked generator designed to be easy to turn even under full load conditions
• Flame-retardant ABS plastic case with a fold down carrying handle
• The meter is RMS calibrated and average responding

The Insulation Resistance Tester 6410-957 (210170) provides high-resistance readings up to 20,000 megohm. It is calibrated directly in megohms, ohms and AC volts. Insulation resistance measurements up to 20 gigohm can be made on all voltage ranges. The tester is also equipped with a 0 to 5000 ohms continuity range and a 0 to 600 V AC or presence of DC voltage measuring range.